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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> low Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> 0 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton/ 970709-F1 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9707592-07-08 Reported Jul 28, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GC071797BTEX02A GC071797BTEX02A G0071797BTEX02-A GC071797BTEX02A GC071797BTEX02.A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst A Miraftab A Miraftab A Miraftab A Miraftab A Miraftab <br /> MS/MSD # 970759212 970759212 970759212 970759212 970759212 <br /> Sample Conc N D N D N D N D ND <br /> Prepared Date 7/17/97 7/17/97 7/17/97 7/17/97 7/17/97 <br /> Analyzed Date 7/17/97 7/17/97 7/17/97 7/17/97 7/17/97 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10ug/L 10ug/L 10jtg/L 30ug/L 60ug/L <br /> Result 95 92 92 28 57 <br /> S % Recovery 95 92 92 93 95 <br /> Dup Result 95 92 93 28 63 <br /> MSD % Recov 95 92 93 93 105 <br /> RPD 00 00 11 00 10 <br /> RPD Limit 0-25 0-25 0-25 0-25 0-25 <br /> LCS # BLK071797 BLK071797 BLK071797 BLK071797 BLK071797 <br /> Prepared Date 7/17/97 7/17/97 7/17/97 7/17/97 7/17/97 <br /> Analyzed Date 7/17/97 7/17/97 7/17/97 7/17/97 7/17/97 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10ug/L 10ug/L 10ug/L 30ug/L 60ug/L <br /> LCS Result 10 97 97 29 65 <br /> LCS % Recov 100 97 97 97 108 <br /> MS/MSE-) 60-140 60-140 60-140 6D-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> EQ ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Pe g Penner <br /> Pr ct Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9707592 BLA <2> <br />